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*= SPL BATCH QUALITY CONTROL REPORT -- PAGWOUSTON LABORATORY <br /> METHOD 8020/602 8880 INTERCHANGE DRIVE <br /> HOUSTON,TEXAS 77054 <br /> PHONE(713)660.0901 <br /> 4Matrix: Aqueous Batch Id: HP_J960503010700 <br /> Units: µg/L <br /> L A B O R A T O R Y C O N T R O L S A M P L E <br /> S P I K E Method Spike Blank Spike QC Limits(**) <br /> C O M P O U N D S Blank Result Added Result Recovery (Mandatory) <br /> Recovery Range <br /> MTBE ND 50 38 76.0 20 - 110 <br /> Benzene ND 50 39 78.0 62 - 121 <br /> Toluene ND 50 38 76.0 66 - 136 <br /> EthylBenzene ND 50 40 80.0 70 - 136 <br /> 0 Xylene ND 50 41 82.0 74 - 134 <br /> M k P Xylene ND 100 83 83.0 77 - 140 <br /> M A T R I X S P I K E S <br /> S P I K E Sample Spike Matrix Spike Matrix Spike MS/MSD QC Limitsf***) <br /> C O M P O U N D S Results Added Duplicate Relative % (Advisory) <br /> Result Recovery Result Recovery Difference RPD <br /> <2> <3> <1> <4> <1> <5> Max. Recovery Range <br /> MTBE 3 20 20 100 20 100 0 20 39 - 150 <br /> BENZENE ND 20 23 115 24 120 4.26 25 39 - 150 <br /> LUENE ND 20 22 110 22 110 0 26 56 - 134 <br /> THYLBENZENE ND 20 22 110 22 110 0 38 61 - 128 <br /> 0 XYLENE ND 20 24 120 23 115 4.26 29 40 - 130 <br /> M & P XYLENE ND 40 47 118 47 118 0 20 43 - 152 <br /> Analyst: LJ values Outside QC Range <br /> Sequence Date: 05/03/96 NC - Not Calculated (Sample exceeds spike by factor of 4 or more) <br /> SPL ID of sample spiked: 9604986-12A ND = Not Detected/Below Detection Limit <br /> Sample File IDt J_561.TX0 t Recovery = [( <1> - c2> ) / <3> ] x 100 <br /> Method Blank File ID: LCS W Recovery - (<1> / <3> ) x 100 <br /> Blank Spike Pile ID: J-537.TX0 Relative Percent Difference = � (<4> - <5> / [(<4> + <5> } x 0.51 x 100 <br /> _- <br /> Matrix Spike File ID: J555.TX0 (**) Source: SPL-Houston Historical Data (3rd Q '95) <br /> Matrix Spike Duplicate File ID: J^556.TX0 (***) Source: SPL-Houston Historical Data (2nd Q '95) <br /> SAMPLES IN BATCH SPL ID : 9604A96-09A 9604A96-10A 9604986-07A 9604986-IIA <br /> 9604986-12A 9604986-13A 9604986-14A 9604B67-01A <br /> 9604B67-02A 9604867-03A 9604867-04A 9604B67-05A <br /> 9604CO2-01A 9604A96-06A <br /> - J <br /> ¢C Officer <br />